package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DeIOperatin implements IOPeration {
    public void work(BookList bookList){
        System.out.println("删除图书......");
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入删除书名:");
        String name= scanner.nextLine();
        int currentSize=bookList.getUsedSize();

        int pos=-1;
        int i = 0;
        for (; i < currentSize; i++) {
            Book book=bookList.getBook(i);
            if(book.getName().equals(name)){
                System.out.println("找到了这本书");
                pos=i;
                break;
            }
        }
        if(i==currentSize){
            System.out.println("没有你要删的书!");
            return;
        }
        
        //开始删除
        for (int j = pos; j < currentSize-1; j++) {
            //bookList[j]=bookList[j+1];
            Book book=bookList.getBook(j+1);
            bookList.setBook(j,book);
        }
        bookList.setBook(currentSize,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功！！！");
    }

}
